SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0581425a3d3a06352277863e75536dad78da87098fd51fe2194609529b10d726' 
  AND token = 'QTOLOPP3cfa0o4cfRA/T/ml9w2/bhXzKYQpOuWUGCtA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}